Electric furnace



MJS. CLAWSON.

ELECTRIC FURNACE.

APPLICATION FILED FEB. 21. 1917.

1,306,948. Patented June 17, 1919 UNITED STATES rare r-;

MONROE S. CLAWSON, OF WEEHAWKEN, NEW JERSEY.

To 'all wiuim it may concern Be it known that I, MONROE S. Cmwson,

ag citize ndf the f llnited States, residing'at Weeh awkemfim tl1e='countyof Hudson and State of Nevvileiseyehave invented certain new and; useful 'Ii'nprovements in Electric I Euriiace's, of which the following is a speci- -This nvention relates to electric furnaces ofa device of this character havin i111 proved nieansfor" discharging the melted hetal v-t 5 Anotl'1"ei-"-object is to provide an improved 'reeeptaeleih'whien the metal is melted;

further object is the provision of improved m'eansfor holding said receptacle.

fither objectsand advantages such as sim plicity, dura'bi'lity,- and cheapness in manufajcture will bebroughtout in the following specificati'on -ancl"illustrated in the accompax'iying drawings in which:

igure 1 is a-top plan view of my furnace, *Fig a frontview thereof,

Fig'r sa longitudinal sectional view of oneof the supports.

Fig: ?-"'s anenlarged sectional view of one of the heads, and

7 perspective view ofthe recep- Referring more particularly to the drawingsfmy invention comprises a base or plate 1 supp or't's12 pivotally mounted thereon; a r0613 connecting said supports; eylindrical heads 'st revolubly mounted between said supports on hollow shafts 5 passing through said supports; a member or recep; moles of high resistance material'mounted betweenitheinner ends of said heads, and

- levers-7 fwhich are secured to. the headse and provided. with ahand-hold 8 for tilting the receptacle to discharge its contents.

Thebas'e 1 is of nonconducting material,

Wood or fiber; Each of the supports 2' is pivoted at oneend to the base 1 and extends low shafts 5 on which the heads i are mounted extend through the apertures 12 in the supportsfl andhave their outer ends reduced V ELECTRIC rUimAcE.

Specification er Letters Patent. Patented 111 16 17, 1919. v Application filed February 21,1917. I Serial No. 150,130. I I I I within a short, distance oftheir innerends. v The ends of the heads 4 are internally threaded, and threaded intotheir outer ends are plugs 13 having centrally located apertures 14L through which the hollow shafts 5 pass. Plugs 15 are threaded into the inner ends of the heads 4:, and are counter-sunk or recessed at 16 to receive the ends of the receptacle 6; Intermediate of the ends of each head is an outlet pipe 17 having its free end reduced for attaching a hose to carry 01% the water used for cooling the heads. 4

' Copper disks 18 having lugs 19, the functions of which will hereinafter appear, are fitted over the hollow shafts 5 and engage the heads 4 which are held 'revoluhle by the hollow shafts 5.

The receptacle 6 is of high resistance material, preferably carbon or graphite, and is adjustably supported between, the heads i 'by engagement of its ends within the recesses 16. The receptacle has a lip'QO to facilitate discharging its contents.

The levels 7 have enlarged heads 21 hav-. ing apertures 22 in which is loosely mounted the hand-hold 8 whereby the levers are [moved to partially rotate the heads 4: to

which they are secured as at 23.

Connection between the source of current, WlilClI may be a generator or transformer,

and the furnace is made by cables secured to the lugs 19 on the disks 18 The current will flow from one head to theother. through the receptacle 6, the resistance of which will cause-the generation of heat for melting the metal placed therein. After the metal is melted, the handle 8 is grasped and the levers? rocked to partially rotate the heads, whereuponthe receptacle 6 will be tilted so that the metal will flow therefrom at the M5120. 1

Having thus described my invention what I claim is:

1. An electric furnace comprising a mam supporting member, side portions pivotally mounted on said supporting mem er, rev- 'oluble heads inountedin said side portions,

a resistance member secured bctwccn said heads adapted to hold the material to be heated. and means for adjusting said portions. 1

2. An electric furnace comprising a main supporting -'member, side portions pivoted thereon heads carried b said side iortions 35a receptacle of high. resistance material disf-Ipfos'ed between urging said side portions toward each other said heads, and means for forholdin said heads and said receotacle in clampedrelation.

.to each other whereby 'ture may be centered in said the point of discharge.

5. An electric furnace comprising a pair.

3. An electric furnace comprising supports','shafts carried by said supports, heads revoluble upon said shafts and servingas contacts, a receptacle of high resistance material supported between said heads and having its top open, and means connected with said heads for WllQIfB-bfStllCl receptacle may be tilted to dischargethe contents thereof.

g; Air-electric furnace comprising spaced water-cooled heads, and a receptacle of high resistance 'material disposed between said heads the sides of s id receptacle being free, andsaid heads beiii g in horizontal relation an increased temperareceptacle at of spaced watercooled heads and a receptacle "of high resistance material disposed between said heads in abutting relation thereto, the sides of said receptacle being free from contact with said heads, and said heads disposed horizontally in relation to each other whereby an increased temperature may be brought to the centerof said receptacle where the metalis discharged.

6. An electric furnace comprising a main supporting member, horizontally extending side portions pivoted thereon, means for ad portions relatively to eachusting said SlC e other, stationary tubular shafts extending through said side. portions in axial alinement wit-h each other, hollow said shafts and having communication with the bores thereof, discharge tubes communicating with said heads, levers secured to said heads, a handle connected with said levers for moving said heads in unison, and a receptacle of high resistance material disposed in clamped relation between said heads.

7. An electric furnace comprising a pair of relatively movable, non-revoluble shafts,

. heads revoluble 113011 said shafts a handle member mnected with both of said heads,

partially rotating them,

heads revoluble upon' incense justing said side portions relatively to each other, tubular shafts extending through said side portions in axial alinement with each other, hollow heads mounted. upon said shafts in communication with the bores thereof and revoluble with respect to said side portions, discharge tubes communicating with said heads, levers secured to said heads, a handle connected with said levers for moving said heads in unison, and a receptacle of high resistance material disposed in clamped relation between said heads.

10. An electric furnace comprising supports, revoluble heads disposed between said supports and serving as contacts, a receptacle of high resistance material supported between said heads and having its top open, said heads being in horizontal relation to each other whereby an increased temperature may be centered in said receptacle at the point of discharge, and means connected with said heads for partially rotating them whereby said receptacle may be tilted to discharge the contents thereof.

11. in an electric furnace, a receptacle of high resistance material mounted between revolnble heads serving as contacts, said re-' 'ceptacle being open at the-top, and said heads being in horizontal relation to each other whereby the temperature imparted to said receptacle is highest in said receptacle at the point of discharge of its contents.

In testimonv whereof I hereto atlix m I y signature.

MQNROE S. CLAs-VSUN. YVitnesses Cumin E. Shannon, [n a} ANNIE L. CniwsoN. [n 5.] 

